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ICD-10 CM Code T23.54

T23.54 Corrosion of first degree of multiple fingers (nail), including thumb

T23.541 Corrosion of first degree of multiple right fingers (nail), including thumb
T23.542 Corrosion of first degree of multiple left fingers (nail), including thumb
T23.549 Corrosion of first degree of unspecified multiple fingers (nail), including thumb

7th Character

The appropriate 7th character is to be added to each code from category T23

A - initial encounter
D - subsequent encounter
S - sequela

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